{"id":"CVE-2015-7575","title":"Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, whi…","summary":"Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, whi…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-19"],"vendor":"mozilla","product":"network_security_services","affected":["network_security_services <= 3.20.1","leap = 42.1","opensuse = 13.1","opensuse = 13.2","firefox = 38.0","firefox = 38.0.1","firefox = 38.0.5","firefox = 38.1.0","firefox = 38.1.1","firefox = 38.2.0","firefox = 38.2.1","firefox = 38.3.0","firefox = 38.4.0","firefox = 38.5.0","firefox = 38.5.1","ubuntu_linux = 14.04","ubuntu_linux = 15.04","ubuntu_linux = 15.10","firefox <= 43.0.1"],"published":"2016-01-09","updated":"2026-10-14","sourceUpdated":"2026-10-14T22:17:14.200","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2015-7575","references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00038.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00041.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00042.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00043.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00044.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00045.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00047.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00048.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-12/msg00139.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-01/msg00005.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-01/msg00058.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-01/msg00059.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00007.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00008.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00101.html","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00166.html","label":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0049.html","label":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0050.html","label":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0053.html","label":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0054.html","label":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0055.html","label":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0056.html","label":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3436","label":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3437","label":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3457","label":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3458","label":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3465","label":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3491","label":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2016/dsa-3688","label":"secalert@redhat.com"},{"url":"http://www.mozilla.org/security/announce/2015/mfsa2015-150.html","label":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html","label":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","label":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","label":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html","label":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html","label":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/79684","label":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/91787","label":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id/1034541","label":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id/1036467","label":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2863-1","label":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2864-1","label":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2865-1","label":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2866-1","label":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2884-1","label":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2904-1","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2016:1430","label":"secalert@redhat.com"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1158489","label":"secalert@redhat.com"},{"url":"https://developer.mozilla.org/docs/Mozilla/Projects/NSS/NSS_3.20.2_release_notes","label":"secalert@redhat.com"},{"url":"https://security.gentoo.org/glsa/201701-46","label":"secalert@redhat.com"},{"url":"https://security.gentoo.org/glsa/201706-18","label":"secalert@redhat.com"},{"url":"https://security.gentoo.org/glsa/201801-15","label":"secalert@redhat.com"},{"url":"https://security.netapp.com/advisory/ntap-20160225-0001/","label":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00038.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00041.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00042.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00043.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00044.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00045.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00047.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00048.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-12/msg00139.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-01/msg00005.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-01/msg00058.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-01/msg00059.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00007.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00008.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00101.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-02/msg00166.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0049.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0050.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0053.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0054.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0055.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2016-0056.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3436","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3437","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3457","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3458","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3465","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3491","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2016/dsa-3688","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mozilla.org/security/announce/2015/mfsa2015-150.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/79684","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/91787","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1034541","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1036467","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2863-1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2864-1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2865-1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2866-1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2884-1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2904-1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2016:1430","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1158489","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://developer.mozilla.org/docs/Mozilla/Projects/NSS/NSS_3.20.2_release_notes","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201701-46","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201706-18","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201801-15","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20160225-0001/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"epss":0.02904,"epssPercentile":0.86891,"ingestedAt":"2026-10-14T23:00:01.997Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T21:32:54.650467Z"},"slug":"CVE-2015-7575","body":"## Overview\n\nMozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, which makes it easier for man-in-the-middle attackers to spoof servers by triggering a collision.\n\n## Affected\n\n- `network_security_services <= 3.20.1`\n- `leap = 42.1`\n- `opensuse = 13.1`\n- `opensuse = 13.2`\n- `firefox = 38.0`\n- `firefox = 38.0.1`\n- `firefox = 38.0.5`\n- `firefox = 38.1.0`\n- `firefox = 38.1.1`\n- `firefox = 38.2.0`\n- `firefox = 38.2.1`\n- `firefox = 38.3.0`\n- `firefox = 38.4.0`\n- `firefox = 38.5.0`\n- `firefox = 38.5.1`\n- `ubuntu_linux = 14.04`\n- `ubuntu_linux = 15.04`\n- `ubuntu_linux = 15.10`\n- `firefox <= 43.0.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.6,"exploitation":0,"ransomware":0},"changes":[]}